.oban-grid-border(@border-color, @gutterSize: 20px) {
  [class*=column] {
    position: relative;
  }
  [class*=column]:before {
    position: absolute;
    left: ( @gutterSize - 1 ) / 2;
    width: 1px;
    height: 100%;
    background-color: @border-color;
    content: '';
  }
  [class*=column]:first-child:before {
    height: 0;
  }
}


